Engineer II
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Join to apply for the Engineer II role at Kaluza
Job title: Engineer II
Location: London / Bristol / Edinburgh - Hybrid
Salary: £55,000 - £70,000
Reporting to: Software Engineering Manager
Kaluza reimagines energy to bring net-zero within everyone’s reach. The Kaluza Platform enables energy utilities to unlock the full value of a radically changing energy system and propel us to a future where renewable energy is sustainable, affordable and accessible for all.
From automating and simplifying core operations including billing to create a lower-cost, higher-engagement experience, to optimising energy usage across smart devices in the home, we turn tough challenges into win-win-win outcomes for customers, suppliers and the energy system.
At Kaluza we embrace a flexible, hybrid work model that balances autonomy with the power of in-person connection. Many of our teams find value in coming together regularly to collaborate, strengthen relationships, and accelerate progress. We’re focused on shaping thoughtful, team-driven approaches that support both business impact and individual well-being.
We also prioritise meaningful company-wide gatherings like our annual conference and end-of-year celebrations, that bring us together to align, connect, and celebrate.
As we're scaling rapidly, we have a number of opportunities available across different teams and levels. The specific role you move forward with will be shaped as we progress through the interview process — allowing us to assess where your experience can have the greatest impact, with the right support around you to enable both your growth and that of the team. Our Talent Acquisition team will guide you through the details as we go.
What will I be doing?
You'll be joining the Kaluza Technology community. We’re a large team of both data-led and product focused Software and Production Engineers, pushing the boundaries of technology and working at an extraordinary scale.
As a collective we strive for engineering greatness and by ensuring best practices across the board of the community.
More specifically, you’ll be working on Kaluza’s Energy Retail platform. This is a SaaS technology platform that aims to revolutionise the operating platforms for energy retailers globally. This platform has been built with scale and technical quality in mind and is the foundation for decarbonisation efforts by Kaluza’s customers.
Our tech stack is very fluid, but broadly you can find yourself working with:
Typescript, Node JS, Terraform, Gitactions, Kubernetes, Docker, AWS, Kafka, GraphQL
Responsibilities
- Contribute to the design, development, and maintenance of scalable backend services using TypeScript.
- Help build event-driven systems that process data reliably and in real-time.
- Collaborate with product managers, designers, and engineers to build thoughtful, user-focused features.
- Write clean, maintainable code and participate in code reviews to support high engineering standards.
- Take ownership of smaller services or components, contributing to their delivery, performance, and improvement.
- Work with SQL or NoSQL databases to store and retrieve data effectively.
- Build and deploy services using cloud platforms, particularly AWS and serverless infrastructure.
- Share knowledge and contribute to a positive, inclusive team culture.
- Experience developing backend applications — ideally using TypeScript, or a strong interest in learning it.
- Some familiarity with event-driven systems and message queues (e.g. Kafka, SQS).
- Hands-on experience with cloud technologies — AWS and serverless a plus.
- Comfortable working with databases (SQL or NoSQL) and understanding trade-offs.
- A collaborative team member who communicates clearly and enjoys solving problems together.
- Curious and self-motivated — you seek out opportunities to learn and grow.
- Passionate about writing high-quality software that makes a real difference to users.
- Bonus: exposure to frontend development (e.g. React)
We are going through a period of significant evolution which is exciting and with it brings lots of opportunity and challenging work, which is not for everyone. To be successful in this role, you will be excellent at operating in ambiguous, changing environments, balancing multiple priorities simultaneously and get enjoyment from making the complex, simple.
Our Software Engineering Interview Process
Initial call with our Talent Acquisition team (30 minutes)
This short call is designed to tell you more about Kaluza and the specific team you’ll be joining, as well as to ensure that the role is the right fit for you
First stage interview (1 hour minutes)
This interview will be with a hiring manager from one of our engineering teams, this interview will cover both mindset and technical questions. We will also incorporate a 15 coding exercise, so have your screen ready to do some coding
Final Interview Loop (3 hours)
Three hours sounds like a long time, but we don’t expect all of these to be completed across one day, but we can support that if you so wish, the three sessions cover the following:
- Behavioural - We use behavioural interviews to understand how you collaborate, solve problems, and build value for customers through real-world examples.
- System Design - Our system design interview explores how you approach complex, high-scale problems — from handling real-time data to building reliable, secure, and scalable systems.
- Pairing - Our pairing interview focuses on problem-solving, clean code, and real-time collaboration — you'll work through a practical task with one of our engineers.
Here at Kaluza we have five core values that guide us as a business:
We’re on a mission, We build together, We’re inclusive, We get it done, We communicate with purpose.
Read more about our values over on our careers site.
From us you’ll get
- Pension Scheme
- Discretionary Bonus Scheme
- Private Medical Insurance + Virtual GP
- Life Assurance
- Access to Furthr - a Climate Action app
- Free Mortgage Advice and Eye Tests
- Perks at Work - access to thousands of retail discounts
- 5% Flex Fund to spend on the benefits you want most
- 26 days holiday
- Flexible bank holidays, giving you an additional 8 days which you can choose to take whenever you like
- Progressive leave policies with no qualifying service periods, including 26 weeks full pay if you have a new addition to your family
- Dedicated personal learning and home office budgets
- Flexible working — we trust you to work in a way that suits your lifestyle
- And more…
We want the best people
We’re keen to meet people from all walks of life — our view is that the more inclusive we are, the better our work will be. We want to build teams which represent a variety of experiences, perspectives and skills, and we recognise talent on the basis of merit and potential.
We understand some people may not apply for jobs unless they tick every box. But if you're excited about joining us and think you have some of what we're looking for, even if you're not 100% sure, we'd still love to hear from you.
Find out more about working in Kaluza on our careers page and LinkedIn.
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#J-18808-Ljbffr- Location:
- Bristol, England, United Kingdom
- Salary:
- £80,000 - £100,000
- Job Type:
- FullTime
- Category:
- Engineering
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